But we don't need this lookup to run every time we address to source1, in order not to make search time longer as a lookup is heavy.
So can I use temporal lookup at a search time? In lookups description there's no limitations about automatical or manual invoking of temporal lookup:
Or am I doing mistake somewhere?
Thanks in advance!
Use the Settings > Lookups > Lookup definitions page to define the lookup table or edit existing lookup definitions. You can specify the type of lookup (file-based or external) and whether or not it is time-based. Once you've defined the lookup table, you can invoke the lookup in a search (using the lookup command) or you can configure the lookup to occur automatically.